JAX-WS HandlerChain使用具体解释

JAX-WS的Handler和Servlet的Filter相似，能够对全部WebServicer进行拦截，在Handler中能够记录日志、权限控制、对请求的SOAP消息进行加密。解密等。JAX-WS提供两个Handler接口，LogicalHandler和SOAPHandler。LogicalHandler处理的是Message Payload。仅仅能够訪问消息单元中的SOAP消息体。SOAPHandler处理的是整个SOAP消息（包括SOAP header和SOAP body)，能够訪问整个SOAP消息。

注冊Handler的方式有以下几种：


实例代码http://download.csdn.net/detail/accountwcx/8922191

JAX-WS中WebService运行顺序如图所看到的



以下用SOAPHandler实如今WebService服务端记录请求内容和响应内容。

import java.io.IOException;
import java.util.Set;

import javax.xml.namespace.QName;
import javax.xml.soap.SOAPException;
import javax.xml.soap.SOAPMessage;
import javax.xml.ws.handler.MessageContext;
import javax.xml.ws.handler.soap.SOAPHandler;
import javax.xml.ws.handler.soap.SOAPMessageContext;

/**
* 记录SOAP请求及响应
* @author accountwcx@qq.com
*
*/
public class LoggerHandler implements SOAPHandler<SOAPMessageContext> {

@Override
public void close(MessageContext context) {
}

@Override
public boolean handleFault(SOAPMessageContext context) {
return true;
}

@Override
public boolean handleMessage(SOAPMessageContext context) {
// 推断消息是输入还是输出
Boolean output = (Boolean) context.get(MessageContext.MESSAGE_OUTBOUND_PROPERTY);
System.out.println(output ? "响应SOAP：" : "请求SOAP：");

SOAPMessage message = context.getMessage();

try {
message.writeTo(System.out);
} catch (SOAPException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}

System.out.println("");

return true;
}

@Override
public Set<QName> getHeaders() {
return null;
}

}

在classpath下建handler-chain.xml配置文件

<?xml version="1.0" encoding="UTF-8"?>
<javaee:handler-chains xmlns:javaee="http://java.sun.com/xml/ns/javaee"
xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<javaee:handler-chain>
<javaee:handler>
<javaee:handler-class>com.rvho.server.ws.handler.LoggerHandler</javaee:handler-class>
</javaee:handler>
</javaee:handler-chain>
</javaee:handler-chains>

在服务实现类上加入HandlerChain配置

package com.rvho.server.ws.impl;

import java.util.Date;

import javax.jws.HandlerChain;
import javax.jws.WebService;

import com.rvho.server.ws.HelloWService;

@WebService(
endpointInterface = "com.rvho.server.ws.HelloWService",
portName = "HelloWSPort",
serviceName = "HelloWSService",
targetNamespace = "http://www.tmp.com/ws/hello"
)
@HandlerChain(file="handler-chain.xml") //加入Handler配置文件
public class HelloWServiceImpl implements HelloWService {
public String index() {
return "hello";
}

public Integer add(Integer x, Integer y) {
return x + y;
}

public Date now() {
return new Date();
}
}

服务实现接口

package com.rvho.server.ws;

import java.util.Date;

import javax.jws.WebService;

/**
* WebService接口
*/
@WebService(
name = "HelloWS",
targetNamespace = "http://www.tmp.com/ws/hello"
)
public interface HelloWService {
/**
* 返回字符串
*
* @return
*/
String index();

/**
* 两个整数相加
*
* @param x
* @param y
* @return 相加后的值
*/
Integer add(Integer x, Integer y);

/**
* 返回当前时间
*
* @return
*/
Date now();
}

client发起index请求，服务端的记录

请求SOAP：
<S:Envelope xmlns:S="http://schemas.xmlsoap.org/soap/envelope/"
xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/">
<SOAP-ENV:Header/>
<S:Body>
<ns2:index xmlns:ns2="http://www.tmp.com/ws/hello" />
</S:Body>
</S:Envelope>

响应SOAP：
<S:Envelope xmlns:S="http://schemas.xmlsoap.org/soap/envelope/"
xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/">
<SOAP-ENV:Header/>
<S:Body>
<ns2:indexResponse xmlns:ns2="http://www.tmp.com/ws/hello">
<return>hello</return>
</ns2:indexResponse>
</S:Body>
</S:Envelope>